Full disclosure: I'm a huge fan of the book and both Green brothers.
When I saw the trailer for this movie, I was really frustrated because I thought that it revealed too much about the plot which I really appreciated when I read the book. But, watching the movie in full gave me a new appreciation for why the book was written, beyond the plot. The point of the book and the movie is to paint a picture of what it's like to live with thought spirals and OCD. The movie did this very well. Sure, the plot was given up in the trailer a bit but it also wasn't the centerpiece of the movie. In fact, the plot felt disconnected and scrambled. However, this, like everything else in the movie was in service to the portrait of the human mental condition Green works to create in his novel. The music, the sounds, the imagery, the script, everything works in union to serve this goal and it's emotional how well it was all done. This is a rare occasion that the works of many come together to produce something beautifully bold and out of the ordinary. It makes me proud to be human and gives me hope for the future, and not just in the personal regard. As a creative, it gives me hope that work like this is possible and desireable.
If anyone associated with the movie gets the chance to read this, thank you. Your work is valuable and you are achieving greatness.